Personal injury cases are usually tried in state courts under state law. But when the plaintiff and defendant are citizens of different states–say, an individual plaintiff living in Georgia sues a company based in Florida–then the case may be removed to a federal court. The federal court must still decide the case based on state law. But federal rules govern procedural questions like the admission of evidence. This can sometimes lead to confusion, as the Eleventh Circuit U.S. Court of Appeals in Atlanta recently found.
Cooper v. Marten Transport, Ltd.
In 2010, a husband and wife suffered serious back injuries after a tractor trailer collided with their car in Georgia. The couple sued the other driver and the company that owned the tractor trailer. As the defendants were not Georgia residents, they had the case removed from state to federal court.